电源技术2011，Vol.35Issue(4)：385-389,5.
机械活化对碳热还原法LiFePO4结构与性能的影响
Effects of mechanical activation on structure and properties of LiFePO4 prepared by carbothermal reduction method
杜伟 1周震涛 1刘金成2
作者信息
- 1. 华南理工大学,材料科学与工程学院,广东,广州,510640
- 2. 惠州亿纬锂能股份有限公司,广东,惠州,516006
- 折叠
摘要
Abstract
LiFePO/C cathode meterial was Synthesized by mechanical activation cmbined with carbotherma reduction method. The influences of parameters of mechanical activation(ball-to-power weight ratio, milling media.the atmosphere teemperature of ball-milling) on the structure and performance of the material were investigated. The structure, morphology and electrochemical properties of LiFePO4/C were analyzed by XRD,SEM,optical particle size analyzer, BET method and galvanostatic charge-discharge method, respectively. The results indicate that the optimum processing conditions of mechanical activation are ball-to-power weight ratio =6∶1. ball-milling at 25℃ for 6 h with Ar protect atmosphere in agate jar. LiFePO4/C composite material synthesized under this processing condition has fine particle size at 500-600 nm and excellent electrochemical performance with 136 mAh/g at 1 C discharge current.关键词
机械活化/碳热还原法/LiFePO4/正极材料/比容量Key words
mechanical activation/ carbothermal reduction/ LiFePO4/ cathode material/ specific capacity分类
信息技术与安全科学引用本文复制引用
杜伟,周震涛,刘金成..机械活化对碳热还原法LiFePO4结构与性能的影响[J].电源技术,2011,35(4):385-389,5.
